Malicious PDF — malware analysis report

Static analysis result for SHA-256 db15c37ae2aacc26…

MALICIOUS

PDF

77.7 KB Created: 2021-03-17 03:31:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f812d6dd40162a339779a2ed9dc89524 SHA-1: 53784aa61588e8549a3c53de471c6170ac9611e0 SHA-256: db15c37ae2aacc264c23049934bb58bb64cbc592d2291dcb9a8902d7ef2f2911
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lozipotod.ru/award?keyword=manual+de+hatha+yoga+108+asanas+pdf
    • https://cdn.sqhk.co/jesupasuzoku/Hgdfiim/dr_drive_apkpure.pdf
    • https://cdn.sqhk.co/vonitumefide/djejaji/98623351819.pdf
    • https://cdn.sqhk.co/wuvupalib/dw73jf5/italian_song_dance_remix.pdf
    • https://cdn.sqhk.co/fodibaniwe/hhg2Ecs/brick_breaker_star_space_king_hile_apk.pdf
    • https://cdn.sqhk.co/bulixanejad/ljjjiaK/supertux_0._6._1_download.pdf
    • https://cdn.sqhk.co/genopeno/cshejj0/6469850015.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/35d476af-3b33-4b9e-8b47-5f073e0037eb/which_sentence_is_an_example_of_a_hyperbole_apex.pdf
    • https://uploads.strikinglycdn.com/files/7cb7dc20-36a5-46d5-ae09-3bebe3b1c968/how_to_use_a_ti_baii_plus_calculator.pdf
    • https://s3.amazonaws.com/vonuxagupeduze/gefanedujani.pdf
    • https://uploads.strikinglycdn.com/files/219f9796-d9eb-413d-a9aa-43a7e0bb8371/how_to_eject_beaters_from_sunbeam_mixmaster.pdf
    • https://uploads.strikinglycdn.com/files/f3a076a6-3dab-4f96-a567-4379e9b2a2ae/77186145358.pdf
    • https://uploads.strikinglycdn.com/files/7fedadad-3866-42d8-86fb-dddd98167bbd/how_to_prepare_for_weight_loss_surgery.pdf
    • https://s3.amazonaws.com/zabejuvijolu/fixazivunetokosonim.pdf
    • https://s3.amazonaws.com/wegemebufojafak/effortless_english_system_free.pdf
    • https://s3.amazonaws.com/ganubifirigevi/why_use_a_causal-comparative_research_design.pdf
    • https://s3.amazonaws.com/jalasilunaz/79821294336.pdf
    • https://uploads.strikinglycdn.com/files/6267a57d-8ab2-4476-b293-afaedb4815c0/what_is_the_focus_of_vygotskys_theory_of_cognitive_development.pdf
    • https://uploads.strikinglycdn.com/files/226fd3ad-1099-40d0-86b5-8d916facacdf/are_glucose_test_strips_accurate.pdf
    • https://uploads.strikinglycdn.com/files/cf32edee-2b37-40f6-b30a-de9c02ad24e5/hp_officejet_pro_8600_plus_print_cartridge.pdf
    • https://s3.amazonaws.com/zizene/congestive_heart_failure_guideline_2018.pdf
    • https://s3.amazonaws.com/vizegemawokaxe/voting_rights_act_of_1965_worksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f285.bin
d6881e1a2d38ab28af92e494ab2c1fcd6a971d6261ff5f8873a507609d4f1951		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF285 5704 bytes
font_01_sfnt_off00010610.bin
272cdabc2b20db0c6bc8c08bf1503ebc132b910ae2d8e9c0992985aa6638e1cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10610 10300 bytes

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